Fuel Filler Door Spring 65 Fury

[65Fury440]

My gas cap door comes open at speed.
Everything has fresh paint so I'm hoping to get a handle on how it works, so hopefully I don't have to pull all the painted stuff out.
I checked the FSM, nothing pointing to the assembly.
How does it work?
There must be a spring in there?
Can anyone point me to an illustration?
Signed- Preventing Chips in FL.

 

[vortdoggie]

My 65 sport fury had the same problem. A small bar magnet of appropriate width fixed it. As far as illustrations of the fuel door assembly my 65 plymouth technical manual might have it.